Global patent index - EP 0972581 A2

EP 0972581 A2 2000-01-19 - Rolling method for bar-shaped rolling stock, in particular steel bars and wire

Title (en)

Rolling method for bar-shaped rolling stock, in particular steel bars and wire

Title (de)

Walzverfahren für stabförmiges Walzgut, insbesondere Stabstahl oder Draht

Title (fr)

Procédé de laminage pour produits en forme de barres, notamment d'acier en barres ou de fils

Publication

EP 0972581 A2 (DE)

Application

EP 99111050 A

Priority

DE 19831481 A

Abstract (en)

The actual rolling force and the resultant roll gap increase are determined. A roll gap correction is determined on the basis of this roll gap increase and a target roll gap in such a way that the actual roll gap approximates the target roll gap. The roll gap correction is implemented within a roll stand control interval.

Abstract (de)

Die vorliegende Erfindung betrifft ein Walzverfahren für stabförmiges Walzgut (5) insbesondere Stabstahl oder Draht (5), in einem Walzgerüst (1) mit zwei über eine Hydraulikzylindereinheit (12) relativ zueinander in einer Anstellrichtung (x) anstellbaren Arbeitswalzen (8), die zusammen ein Walzkaliber mit einem Ist-Walzspalt (s1) bilden, so daß das Walzgut (5) aus dem Walzgerüst (1) mit einer Ist-Höhe (h0) und einer Ist-Breite (b0) mit einer Walzgeschwindigkeit (v0) ausläuft, wobei das Walzgut (5) mit einer Ist-Walzkraft (F1) gewalzt wird. Erfindungsgemäß ist vorgesehen, daß die Ist-Walzkraft (F1) erfaßt wird, anhand der Ist-Walzkraft (F1) eine walzkraftbedingte Walzspaltauffederung (s1) bestimmt wird, anhand der walzkraftbedingten Walzspaltauffederung (s1) und einem Soll-Walzspalt (s1*) ein Walzenanstellungs-Korrekturwert (a1) derart bestimmt wird, daß der Ist-Walzspalt (s1) dem Soll-Walzspalt (s1*) angenähert wird, und eine Walzenanstellung (a1) innerhalb einer Gerüstregelzeit (T) um den Walzenanstellungs-Korrekturwert (a1) geändert wird. <IMAGE>

IPC 1-7 (main, further and additional classification)

B21B 37/64

IPC 8 full level (invention and additional information)

B21B 1/16 (2006.01); B21B 37/16 (2006.01); B21B 37/64 (2006.01); B21B 1/18 (2006.01); B21B 37/48 (2006.01)

CPC (invention and additional information)

B21B 37/64 (2013.01); B21B 37/16 (2013.01); B21B 1/18 (2013.01); B21B 37/48 (2013.01)

Citation (search report)

  • [A] US 5090224 A
  • [A] US 4909060 A
  • [A] PATENT ABSTRACTS OF JAPAN vol. 008, no. 158 (M-311), 21. Juli 1984 (1984-07-21) & JP 59 054412 A (TOKYO SHIBAURA DENKI KK), 29. März 1984 (1984-03-29)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 008, no. 132 (M-303), 20. Juni 1984 (1984-06-20) & JP 59 033017 A (TOKYO SHIBAURA DENKI KK), 22. Februar 1984 (1984-02-22)

Designated contracting state (EPC)

AT BE CH DE GB IT LI SE

EPO simple patent family

EP 0972581 A2 20000119; EP 0972581 A3 20020515; EP 0972581 B1 20031022; AT 252425 T 20031115; BR 9902468 A 20000314; DE 19831481 A1 20000120; ID 23065 A 20000120; JP 2000033408 A 20000202; KR 20000011689 A 20000225; US 6112566 A 20000905

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